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Chapter: 20 / Q: 11
When the label on a packaged food item states that 100 g contains 650 kJ of energy, it means that
Chapter: 20 / Q: 12
In order to lose body fat, diet and exercise must be organized so that the energy value of the food intake is
Chapter: 20 / Q: 13
A block of wood (a poor conductor of heat) whose temperature is 15 °C is placed in contact with a block of steel (a good conductor of heat) of the same size but whose temperature is 20 °C. Both are touched with a hand whose skin temperature is 28 °C. Which of the following is true?
Chapter: 20 / Q: 14
What is heat? It is a
Chapter: 20 / Q: 15
Which of the statements about heat is true? Heat is
Chapter: 20 / Q: 16
What does kinetic theory allows us to understand that the temperature of an object measures? The
Chapter: 20 / Q: 17
What may the ‘thermal energy’ of the particles in an object be defi ned as?
Chapter: 20 / Q: 18
Which of the following factors contributes LEAST to the human sensation of ‘hot’ or ‘cold’ when an object is touched?
Chapter: 20 / Q: 19
Two identical beakers hold 100 ml and 200 ml of water at 20 °C. They are heated for one minute each using the same Bunsen burner fl ame and their temperature is measured. What will their temperatures be?
Chapter: 20 / Q: 20
How does a clinical (or fever) thermometer differ from a standard thermometer?
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